Thermometer



PatentedgOct. 1,9276. t l. 'A i i il i I Y emmss-msaYaaafaemiea aYcoivnaaisrias,.Y onnQGrrEsTEn,www,YORK7 ItCQRPQLRMIOM191?, NEWremt'-A1,

. t @Saleem-aaa! 1 ,l @Application nfledngust'z, 1925K' semaine;52,314.v 'y

My inventionjrelates to thermometers lar-thermometer tube 11 havinga-stem portion@ alvarietyjfor 'examplm adapted'for use with 12providedwith a swivelhn-utl for mounti' a vbo`iler pipeline 'or' the.lile,f for indica-t ing-'the instrument in a sock-'et or othersup liligjtlie` temperature oi".ste'a1n, .one obj-ect of l porting.ni'eans'withV its. bulb' portionflt in'- 15' 5 thein'vention' being toprov ide thermomefA thejeteam', the temperatureo-whichi-s'to be ter Q fthis typeadapted toy indicatedirectily indicated/*A615 isfthe iusual`orany vsuitthe lnumber 'of 'degrees Iof"super-'heatv of ablyi-Xed"sca-leshaving graduations*'marledfeo ste'ani, without thenecessity"ofreerence 'to in terms ofdfegrees of tempe'ratur'ehand co.stearntables or other charts. Another ob- ,Operating'wvithithetliermo'meter stema and A "ect isfthe Drovisi'onotsuclr a thermometer liuid coliimnto indca-teftheactualitem;ler-

having meansadapted to readily rsetto ature ot tliefsteamf'or 'other vInediuml to` cerrespo l1 'withfan observed steam pressure which the`Abulb isv subjected-L; fat 116i is the: 65 and'to yindicate directlyfthedegreeszo'suPQY-V glass front enclosi'ngftlie "scale-rase; andi-'theheat'ofjsteam'at' anygiventeinperature'and v instrument,'asfsotarddeserihedc gtiolfllmown, Le

V 'pressiijrfe vwithin 1 tlreusual working range.' constructionandfthereaiore' 1 needs no; fuphe'r yurther Iobject isjto provide an'instrumentexplanation l i 1 l 1,; oflthelpabovef character inacomple-te and* It has been"found-.thatfani finstrumentfof 70 convenientform' adal'atedl to indicate actualV lthe above characteri mayyhavepcombinedv, steam temperature and comprisingconveni therewith adevice adapted to be set with iently adjustable meansadapted to beread-` reference'tothe steam pressure observed from ily set to acorresponding observed pressure fla gauge and corresponding with the temto thereby indicate directly also the degrees iperatureappearing onthescale 15, to indi y75 of super-heat in the steam. Cate dlrectly. thenumber of degrees of 'To these and other ends `the invention re-`Super-heat in the fsteam at the givenV sides incertain improvements andcombinatemperature, and pressure' so that this tion of parts, all aswill be hereinafter more Vmeasurement-may be made' and directly inpfully described, the novel features being dl'cated solely by means ofthe thermometer 80 pointed out in the claims at the -end of the Vwithoutcomputations and without slow and Specification, v f f cumbersomereference to steam tables, charts In' the drawings 1. and the like.'This' result is obtained in the,

Figure 41 is a front elevation of'a therpleSeIlt I11b0d1mntbypr0-vdingon the side mometer embodying the present invention;y 0f the. SCale-Cas@10 Opposite the, fixed S5 l" Fjoure 2 is 1 perspective rear `View y0f a,telllpel'atllle Scale l5, -a flXeCl pleSSule portim 0f the Same K l pscale 17V .corresponding to the ordinary A Figure 3 is anenlargedsectional viewvon `lgeO .Steam pressures. The casing a the line S11-SainFigure 2. JaCent.. this scale is .slotted as at 18 and Figure 4 is anenlarged sectional view on 1 11 lS V,S1013 1S Slldably mounted an ad-Yenthe line 4&-42 in Figure 'Y j ]ustablescale str1p'19 provided with grad-Figure 5 is a front elevation of a portion `uatOIlS `rrlarked -inAdegrees of" temperaof the casing with the scale plates removed; turesuch aS'emplOyed on the fixed temperaand l i ture-scale 15. Scale 19 issecured as .by

Figure 6 is a detail view of `an operatingmeans of rivets 2O to shoes21, sliding insa 95 rack portion detached. j rabbeted portion lo-slot 18, as shown, so

l Similar reference numerals throughout `that the'scale may be adjustedvertically to v rthe several views indicate the same-parts. set the Zeroof the scale at its lower end to The invention is embodied in thepresent any selected pressure on Vscale 17, the top of instance, by wayof illustration, in an index the 'scale-casebeing for this purposeformed 100' thermometer of ythe liquid column type withan opening`22through which the lupadapted for insertion through a boilerwall perend ofV scale 19 'may play. Secured to y a or into a steam pipe line, aswell understood the rearlsides of shoes 21 is a rack 23 mesh`- y in theart. This embodiment comprises ing withja pinion 21jonla spindle25'rotatf preferably a VV shaped scale-case indicated ablysupportedwinbearings 26 at the back oi' W5 f generally at 10, in which is mounted aglass the scale-case and carrying a knurled thumb vsure of the steam.

piece ornut 27 projecting Vconveniently at the side of the casing.

vIt is apparent that by turning nut 27, the auxiliary temperature scale.19 may be quickly adjusted to set its Zero point to coincide withanyselected pressure on scale 17 corresponding to the observed gauge pres-The reading on scale 19 then indicated by the top ot the mercury columnot the thermometer tube gives the number of degrees of super-heat in thesteam at the given temperature. Thus, as shown in Figure 1, auxiliary'scale 19 has been set to a pressure 200 on scale 17 corresponding to anobserved steam pressure of 200 pounds per square inch. The mercurycolumn then stands at, approximately, 15 F. on scale 19, so that thesteam, at a pressure of 200 pounds and temperature of l0()O is shown ltocontain, approximately, 15 super-heat.

rThe invention thus provides an instrument of practical self-containedform adapted to simultaneously indicate the steam temperature and by a.simple setting in accordancevvith an observed gauge pressure, toindicate directly the number of degrees of super-heat corresponding tosuch pressure and temperature, thereby obviating the in-` convenience,Waste of time and likelihood of error attendant upon the resort totables and charts for such data.

perature scale cooperating With said pres-Y sure scale and indicatingmeans, to indicateV the number of degrees of superheatin a gas at agiven pressure.

3. A thermometer comprising a temperature sensitive indicating means, aiiXed temperature scale therefor, a pressure scale, a -slidabiy mountedauxiliary temperature scale adapted to be set with reference to anyselected pressure on said pressure scale corresponding to a temperatureindicated on said iixed temperature scale for co-operation with saidindicating means to indicate directly the number of degrees of superheatof a gas at a given temperature and pressure.

' CHARLES B. CARSON.

